package com.hmdp.service.impl;

import cn.hutool.core.util.BooleanUtil;
import cn.hutool.core.util.StrUtil;
import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;
import com.hmdp.constants.RedisConstants;
import com.hmdp.dto.Result;
import com.hmdp.entity.Shop;
import com.hmdp.mapper.ShopMapper;
import com.hmdp.service.IShopService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.utils.CacheClient;
import com.hmdp.utils.RedisData;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.Resource;
import java.time.LocalDateTime;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;


@Service
public class ShopServiceImpl extends ServiceImpl<ShopMapper, Shop> implements IShopService {

    @Resource
    private StringRedisTemplate stringRedisTemplate;

    @Resource
    private CacheClient cacheClient;

    @Override
    public Result queryById(Long id) {
        // 缓存穿透
//         Shop shop = cacheClient.queryWithPassThrough(RedisConstants.CACHE_SHOP_TTL,TimeUnit.MINUTES,
//                 RedisConstants.CACHE_SHOP_KEY,id,Shop.class,this::getById);

        // 互斥锁解决缓存击穿
//        Shop shop = cacheClient.queryWithMutex(RedisConstants.CACHE_SHOP_TTL,TimeUnit.MINUTES,
//                 RedisConstants.CACHE_SHOP_KEY,id,Shop.class,this::getById);

        // 逻辑过期解决缓存击穿
        Shop shop = cacheClient.queryWithLogicalExpire(RedisConstants.CACHE_SHOP_TTL,TimeUnit.MINUTES,
                RedisConstants.CACHE_SHOP_KEY,id,Shop.class,this::getById);
        if (shop == null) {
            return Result.fail("店铺不存在");
        }
        return Result.ok(shop);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public Result update(Shop shop) {
        Long id = shop.getId();
        if(id == null){
            return Result.fail("店铺id不能为空");
        }
        // 1.更新数据库
        updateById(shop);
        // 2.删除缓存
        stringRedisTemplate.delete(RedisConstants.CACHE_SHOP_KEY + id);
        return Result.ok();

    }

}
